Will Two Do? Varying Dimensions in Electrocardiography: The PhysioNet/Computing in Cardiology Challenge 2021 1.0.3

File: <base>/training/ningbo/g11/JS20661.hea (755 bytes) 
JS20661 12 500 5000
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JS20661.mat 16x1+24 1000.0(0)/mV 16 0 -29 20371 0 V6
# Age: 68
# Sex: Female
# Dx: 284470004,426783006,55930002
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown